Anode active material for lithium secondary battery, method for manufacturing same, and lithium secondary battery comprising anode active material
A positive electrode active material and lithium secondary battery technology, applied in secondary batteries, lithium batteries, battery electrodes, etc., can solve the problems of small surface area, low rate capability, low initial capacity, and small active area
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Embodiment 1
[0228] [Example 1: Preparation of positive electrode active material]
[0229] In a batch-type 4L reactor set at 60°C, nickel sulfate, cobalt sulfate, and manganese sulfate were added to water so that the composition of the lithium composite metal oxide forming the positive electrode active material was LiNi 0.6 mn 0.2 co 0.2 o 2 , and an aqueous solution containing a metal raw material for forming a lithium composite metal oxide was prepared. Herein, connection was made such that the aqueous solution was introduced into the reactor under the condition that the total concentration of the metal raw material in the aqueous solution was 2M. Additionally, a 4M solution of NaOH and a concentration of 7% NH 4 OH aqueous solution, and connect each to the reactor.
[0230] After introducing 3 liters of deionized water into the co-precipitation reactor (capacity 5 L), dissolved oxygen in the water was removed by purging the reactor with nitrogen gas at a rate of 2 liters / minute, a...
Embodiment 2
[0232] [Example 2: Preparation of positive electrode active material]
[0233] In a batch-type 4L reactor set at 60°C, nickel sulfate, cobalt sulfate, and aluminum sulfate were added to water, so that the composition of the lithium composite metal oxide forming the positive electrode active material was LiNi 0.8 Al 0.05 co 0.15 o 2 , and an aqueous solution containing a metal raw material for forming a lithium composite metal oxide was prepared. Herein, connection was made such that the aqueous solution was introduced into the reactor under the condition that the total concentration of the metal raw material in the aqueous solution was 2M. Additionally, a 4M solution of NaOH and a concentration of 7% NH 4 OH aqueous solution, and connect each to the reactor.
[0234] After introducing 3 liters of deionized water into the co-precipitation reactor (capacity 5 L), dissolved oxygen in the water was removed by purging the reactor with nitrogen gas at a rate of 2 liters / minute,...
Embodiment 3
[0236] [Example 3: Preparation of positive electrode active material]
[0237] In a batch-type 4L reactor set at 60°C, nickel sulfate, cobalt sulfate, manganese sulfate, and sodium tungstate dehydrate were added to water, so that the composition of the lithium composite metal oxide forming the positive electrode active material was LiNi 0.6 mn 0.2 co 0.2 W 0.01 o 2 , and an aqueous solution containing a metal raw material for forming a lithium composite metal oxide was prepared. Herein, connection was made such that the aqueous solution was introduced into the reactor under the condition that the total concentration of the metal raw material in the aqueous solution was 2M. Additionally, a 4M solution of NaOH and a concentration of 7% NH 4 OH aqueous solution, and connect each to the reactor.
[0238] After introducing 3 liters of deionized water into the co-precipitation reactor (capacity 5 L), dissolved oxygen in the water was removed by purging the reactor with nitroge...
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Abstract
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